Push-rod



Nu. 6|7,4'84. Patented lan. I0, 1.899. B. HASKELL.

PUSH ROD.

(Application led June 8, 189B.\

(No Model.)

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UNITED STATES PATENT EEICE.

BRODERICK HASKELL, OF GRAND RAPIDS, MICHIGAN.

PUSH-ROD.

SPECIFICATION forming part of Letters Patent No. 617,484, dated January10, 1899.

Application led June 8, 1898. Serial No. 682,899. (No model.)

T0 a/ZZ whom, it may concern:

Be it known'that I, BRoDERIcK HAsKELL, a citizen of the United States,residing at Grand Rapids, in the county of Kent, State of Michigan, haveinvented certain new and useful Improvements in Push or Thrust Rods; andI hereby declare the following to be a full, clear, and exactdescription of the saine, reference being had to the accompanyingdrawings, in which- Figure lis a view in elevation of anairbrake-cylinder push-rod embodying my in- Y vention. Fig. 2 is alongitudinal section of the push-rod shown in Fig. 1. Fig. 3 is a viewof the invention as applied to the lower connection-rod of a brakesystem, and Fig. 4 is a longitudinal section of t-he connection-rodshown in Fig. 3.

Like symbols refer to like parts wherever they occur.

My invention relates to the construction of that class of railwaydevices commonly used in connection with a brake system for applyingpower to the brakes. y

.Push-bars and connection-rods for brake systems, especially wherepower-brakes are employed, must be so constructed as to ob- `tain theminimum of wear to avoid lost motion, accuracyin length, or distan cefrom center of pin-hole to center of pin-hole or between the points ofreceived Iand-applied powervto facilitate construction, adjustment,

and replacement. and strength proportionate to the work to be done; andto obtain these results certain standards have been established by theMaster Oar Builders Association, to

which all of said devices must conform. In the production of this classof devices two methods are commonly practiced--casting and forging-thefirst of which is objectionable, inasmuch as excessive weight of metalis required to obtain the desired strength, and the second for thereason that skilled labor and careful workmanship are required to obtainaccurate results as to length, distance between pin-holes, &c.

The object of my present invention is to obtain ya construction ofpush-bar or thrust-rod which can be accurately and inexpensively madeand will possess the maximum of strength with the minimum of weight.

In carrying out my invention I combine with a jaw having a pin-hole orcenter and with an end plug or with two jaws, each having a pin-hole orcenter, which jaws may be of cast metal, an interposed tubularconnection which may be wrought metal, the castings having grooves intowhich the wrought metal of the pipe is crimped or forced to unite theparts, and such a construction or its equivalent embodies the mainfeature of my invention.

tion more fully, so that others skilled in the art to which itappertains may apply the same.

In the drawings, A indicates a jaw or clevis having a center orpin-hole, of which two may be combined with an intermediate tubularsectionl B to constitute a thrust-rod (see Fig. 3) or a single one withan end plug a to constitute an air-brake push-rod, as shown in Figs. land 2.

I will now proceed to describe my inven-A The jaws A A and end plug amay, if de- .i

. of the parts A ct within the bore of the tubu- Among the advantagesincident to a pushi bar or thrust-rod constructed in accordance withmyinvention are the facility with which the length of the push-bar ordistance between centers of pin-holes of the end pieces of thethrust-rod can be accurately gaged to meet requirements, the dispensingwith skilled labor and special machinery in the manufacture, and thereduction in cost and weight for a push-bar of given size and strength.

Inztsmuch sts the construction herein set forth is not particularlydesirable for pullrods or rods under tension, though of utility inthrust or push rods where the parts are under compression, whereverherein the Word push-rod is employed it is intended to embrace not onlywhat is technically termed a pusli-rod, but such connection-rods Wherethe power is applied between centers by a, thrust in contradistinctionfrom pull rod.

Having thus described my invention, what I claim, and desire to secureby Letters Pittent, is-

l. In et pusl1-bar or thrust-rod, the combination with end pieces one ormore of which is a jaw or clevis having a center or pin-hole, of aninterposed tubular wrought-metal connection crimped to the end pieces,whereby :Lccuracyis obtained in the distances between the points ofpower, substantially as and for the purposes specified.

2. In a push-bar, the combination with e jaw-section having :t tangprovided with :L circumferential groove, and a plug-section having a,tang provided with a circumferential groove, of an intermediate tubulztr section which receives the tangs of the end sections and is unitedthereto by crimping the tub ulztr section into the grooves of the endsections, substantially its and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses,this 6th day of June, 1898.

BRODERICK HASKEIJL.

Witnesses:

ERNEST N. WELLER, J. E. ILIURRAY.

